Smurf
Well-known member
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If ppl do what you say below the water output would be upto 10 ppm not 0 ppm or did you mean have both di tanks connected to start with?
I live in a flat & twin DI is perfect. As Mark says. Run 1st till ppm 10 then add 2nd DI. When that then reaches 10 change resin in 1st DI & use that as 2nd DI. Works brilliant.